.to-animate {
  width: 50px;
  height: 50px;
  background: green;
  position: absolute;
  top: -25px;
  left: -25px;
  border-radius: 25px;
  opacity: 1;
}
svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 640px;
  height: 480px;
  display: block;
}
path {
  fill: none;
  stroke: #000;
}